Mechanical and microstructural properties of Nylon-12/carbon black composites: Selective laser sintering versus melt compounding and injection molding

Athreya, Siddharth Ram; Kalaitzidou, Kyriaki; Das, Suman

doi:10.1016/j.compscitech.2010.12.028

Cited by 116 publications

(69 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the powders with 1 and 5 wt% IF-WS 2 , and 1 wt% GNP addition have the FRI value of 1.28, 1.36 and 1.33, respectively, which is lower than PEEK 450PF and even lower than that of the EOS PEK HP3 powder (1.58). This excellent low sensitivity to the flow rate is beneficial for the powder application in HT-LS, and such feature could be originated from the round powder shape and the partially exposed nanofillers of WS 2 and GNP that both have excellent lubricating properties, as shown early in Fig. 5.…”

Section: Particle Size Distribution (Psd) and Rheological Properties mentioning

confidence: 99%

“…For a long time, polyamides (PA11 and PA12) have predominantly been used for a standard LS process, due to their excellent processability. The incorporation of reinforcement to polyamides can lead to composite components with improved performance and widened applications [2][3][4]. However, for harsh environments such as aerospace, defence and gas applications, the currently available polymers for LS cannot meet these requirements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new method to prepare composite powders customized for high temperature laser sintering

Yazdani

Chen

Benedetti

et al. 2018

Composites Science and Technology

View full text Add to dashboard Cite

Composites have the potential to enhance the mechanical properties of components fabricated by additive manufacturing; however, the bottleneck is the limited number of polymeric composite powders available for this manufacturing process. This paper describes a generically new method to create composite powders that are suitable for High Temperature Laser Sintering (HT-LS). C-coated Inorganic Fullerene-like WS 2 (IF-WS 2 ) nanoparticles and graphene nanoplatelets (GNPs) have been chosen to demonstrate their incorporation into a high performance polymer matrix: Poly Ether Ether Ketone (PEEK). The morphological and physical property investigations have confirmed that the resulting composite powders exhibit the desired particle morphology, size, distribution and flowability for HT-LS applications. Further preliminary sintering results have demonstrated that they are comparable to the currently available commercial grade of PEEK powder HT-LS applications in terms of powder packing properties and flow ability. The new strategy reported here brings in great potential for the additive layer manufacturing of high performance polymeric composite components with improved mechanical and added functionalities by choosing the proper matrix and filler combination.

show abstract

Section: Particle Size Distribution (Psd) and Rheological Properties mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new method to prepare composite powders customized for high temperature laser sintering

Yazdani

Chen

Benedetti

et al. 2018

Composites Science and Technology

View full text Add to dashboard Cite

show abstract

“…However, the peak intensity of printed PA12 was slightly lower than the IM samples, suggesting the lower crystallinity exhibited by the printed sample, or probably the rougher surface of printed sample might reduce or distort the peak intensity. In the case of PA12 that present α-form crystals, there should be two strong adjacent peaks in the diffraction angles of 20-22° [ 53]. Although no significant reflection corresponds Figure 15.…”

Section: Xrd Analysismentioning

confidence: 99%

The improvement of mechanical and thermal properties of polyamide 12 3D printed parts by fused deposition modelling

Rahim¹,

Abdullah²,

Akil³

et al. 2017

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. This paper addresses the utilisation of fused deposition modelling (FDM) technology using polyamide 12, incorporated with bioceramic fillers (i.e. zirconia and hydroxyapatite) as a candidate for biomedical applications. The entire production process of printed PA12 is described, starting with compounding, filament wire fabrication and finally, FDM printing. The potential to process PA12 using this technique and mechanical, thermal and morphological properties were also examined. Commonly, a reduction of mechanical properties of printed parts would occur in comparison with injection moulded parts despite using the same material. Therefore, the mechanical properties of the samples prepared by injection moulding were also measured and applied as a benchmark to examine the effect of different processing methods. The results indicated that the addition of fillers improved or maintained the strength and stiffness of neat PA12, at the expense of reduced toughness and flexibility. Melting behaviours of PA12 were virtually insensitive to the processing techniques and were dependent on additional fillers and the cooling rate. Incorporation of fillers slightly lowered the melting temperature, however improved the thermal stability. In summary, PA12 composites were found to perform well with FDM technique and enabling the production of medical implants with acceptable mechanical performances for non-load bearing applications.

show abstract

“…the detailed resolution, mechanical integrity and dimensional stability) is determined both by the building process and the properties of the original powder. Over the years, most polymeric LS research has focussed either on the manufacturing process or on the characterization of the final sintered parts [1][2][3][4][5][6]. Very little attention has been given to the raw powders, their influence on the sintering process and ultimately their relationship with the part properties.…”

Section: Introductionmentioning

confidence: 99%

Morphology of polymeric powders in Laser Sintering (LS): From Polyamide to new PEEK powders

Berretta

Ghita

Evans

2014

European Polymer Journal

107

View full text Add to dashboard Cite

In an attempt to expand the range of engineering polymers used for laser sintering, this paper examines the morphology, flowability and interparticle interactions of two commercially available poly (ether ether) ketone (PEEK) powders, not yet optimised for the LS process, by comparison with the LS optimised Polyamide (PA) and Polyetherketone (PEK) powdered polymers . The effect of incorporating fillers and additives on the flow behaviour is also analysed. The Particle Size Distribution (PSD) results alone do not allow ranking the powder materials in relation to the flow behaviour. The particle morphology has a stronger influence on the flow characteristics for materials with similar PSDs. The work also provides additional characterization parameters to be considered when analysing LS powders. Graphical abstract

show abstract

Mechanical and microstructural properties of Nylon-12/carbon black composites: Selective laser sintering versus melt compounding and injection molding

Cited by 116 publications

References 21 publications

A new method to prepare composite powders customized for high temperature laser sintering

A new method to prepare composite powders customized for high temperature laser sintering

The improvement of mechanical and thermal properties of polyamide 12 3D printed parts by fused deposition modelling

Morphology of polymeric powders in Laser Sintering (LS): From Polyamide to new PEEK powders

Contact Info

Product

Resources

About